Wyatt Jess Oleff (born July 13, 2003) is an American actor, known for playing Stanley Uris in It and its 2019 sequel, as well as the role of Stanley Barber in I Am Not Okay with This (2020), and a young Peter Quill in the Marvel Cinematic Universe (MCU) superhero films Guardians of the Galaxy (2014) and Guardians of the Galaxy Vol. 2 (2017) by Marvel Studios.
Oleff was born in Chicago, Illinois, to Doug and Jennifer Oleff, living there for the first seven years of his life. He then moved to Los Angeles with his parents and began acting. One of his earliest acting roles was in a commercial for Coldwell Banker.